CN1231923C - Manufacturing method of pulse resistant surge voltage insulating material - Google Patents
Manufacturing method of pulse resistant surge voltage insulating material Download PDFInfo
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- CN1231923C CN1231923C CN 02111615 CN02111615A CN1231923C CN 1231923 C CN1231923 C CN 1231923C CN 02111615 CN02111615 CN 02111615 CN 02111615 A CN02111615 A CN 02111615A CN 1231923 C CN1231923 C CN 1231923C
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Abstract
The present invention relates to a method for manufacturing pulse-resistant surge voltage insulating materials, which is characterized in that nanometer composite particles with a multilayer structure are adopted as additives. Semiconductor oxides of a nanometer grade are adopted as core materials by the composite particles, the surface is also deposited with one kind or more than one kind of other kinds of oxides and is then coated with one kind or more than one kind of organic matter. The nanometer composite particles with the multilayer structure are uniformly dispersed in insulating resins, insulating plastics or insulating rubber so that the pulse-resistant surge voltage insulating materials are made.
Description
Technical field
The present invention relates to a kind of is the manufacture method of the pulse resistant surge voltage insulating varnish of additive with the nano-multilayered structures composite material, belongs to nano novel technologic material field.
Background technology
As everyone knows, frequency control motor has advantage that conventional motors does not possess, and as more efficient, more accurate, more energy-conservation and safeguard simply etc., has become a great development direction of electromechanical industries.Yet the application of converter technique can cause the insulating material premature damage of electromagnetism enamelled wire.Its reason is because frequency converter when using, and the electric current in the motor has and exceeds towards characteristics such as voltage, high frequency, the fast speed pulse rates of climb, can produce partial discharge, space charge accumulation and dielectric heating, causes the insulating material quick aging to damage.This has become one of technological difficulties of restriction frequency control motor extensive use.
United States Patent (USP) 4,935,302 propose to add the pulse resistant surge voltage ability that inorganic oxide such as chromium oxide, iron oxide and their mixture can improve insulating material in insulating material.United States Patent (USP) 6,190,770 B1 have been invented in insulating material and to have been added alpha-type aluminum oxide and γ type alumina mixture to improve the pulse resistant surge voltage ability of insulating material.United States Patent (USP) 5,654,095 has invented a kind of pulse resistant surge voltage enamelled wire, the surge voltage that can resist 3000V, heat resisting temperature reaches 300 ℃, and the voltage rise time reaches 100KV/usec, and frequency reaches 20KHZ.This invention is to have added the overcoat that one deck is made up of metal inorganic oxide and organic insulating material in conventional magnet wire insulation layer.Wherein the kind of metal inorganic oxide comprises Nano titanium dioxide, aluminium oxide, silica, zinc oxide, iron oxide and various clay.But because nanometer particle has very big specific area, reunite, be difficult in the insulating varnish and evenly disperse, thereby be difficult to bring into play the characteristic of nano-powder, really reach the purpose that improves the pulse resistant surge voltage ability as effectively not handling very easily.Method at submicron order (0.2～0.3 μ m) coating titanium white surface coated inorganic oxide is provided among CN 1108279A and the EP393857, has its objective is production durability titanium dioxide, improved titanium oxide covering power and weatherability.Because nano grain surface can big, easily be reunited, particularly existing part reunion or sintering produce through between the nano-powder particle that high-temperature calcination obtains, and adopt general technology to be difficult to implement simple particle and coat.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the defective that above-mentioned prior art exists, provide a kind of nano particle of multi-layer compound structure that uses to be additive, this additive can evenly disperse in insulating resin, and can make and have the insulating material of pulse resistant surge voltage performance preferably.
The manufacture method of a kind of pulse resistant surge voltage insulating varnish of the present invention, it is characterized in that it is is additive with a kind of Nano composite granules with sandwich construction, this composite particles is to be core material with the nano semiconductor oxide, evenly be deposited with a kind of oxide on its surface, and coat organic substance again, form a kind of nano-multilayered structures composite particles; The Nano composite granules that again this is had a sandwich construction is dispersed in polyamide-imide resin-methyl pyrrolidone solvent insulating lacquer and makes the insulating varnish with pulse resistant surge voltage performance; Wherein:
The nano semiconductor oxide of described composite particles is titanium dioxide, iron oxide or chromium oxide;
The oxide of described nano semiconductor oxide surface deposit is silica, aluminium oxide, barium monoxide or calcium oxide, and its deposit amount is 0.5～50wt% of nano semiconductor oxide matrix;
The surface coated organic substance of nano semiconductor oxide composite particle of described deposited oxide is lauryl sodium sulfate, polyvinylpyrrolidone, sodium laurate, odium stearate, silicone couplet or titanate coupling agent, and its covering amount is the 0.5-25wt% of described composite particles;
The manufacturing step of this pulse resistant surge voltage insulating varnish is: according to the above ratio, the nano semiconductor oxide is joined in the deionized water, stir and be made into slurries, add Al in these slurries
2(SO
4)
3Solution, BaCl
2Solution, CaCl
2Solution or Na
2SiO
3Solution is heated to 70 ± 0.2 ℃, while stirring NaAc solution, Na
2CO
3Solution or H
2SO
4Solution is controlled in the 30min and dropwises, and is warming up to 80 ± 0.2 ℃ behind the insulation 1h, filter behind the insulation 1h, wash to filter cake and no longer include acid ion, this filter cake is dry under 120 ℃, again through 300 ℃ of heat treatment 2h, obtain being deposited with the nano-multilayered structures composite particles of oxide; According to the above ratio with the nano-multilayered structures composite particles, add in the deionized water again, be warming up to 100 ℃, add above-mentioned organic substance coating, be cooled to 50 ℃ behind the insulation 2h, filter then, filter cake 100 ℃ of crushed after being dried, is obtained having the Nano composite granules of sandwich construction; With this nano-multilayered structures composite particles, use the method for high speed dispersion, be distributed in polyamide-imide resin-methyl pyrrolidone solvent insulating lacquer, the ratio that finally is prepared into powder and insulating resin is the pulse resistant surge voltage insulating varnish of 1: 10 mass ratio.
Titanium dioxide crystal form is anatase titanium dioxide, rutile-type or its mixing phase structure in the above-mentioned nano semiconductor oxide; Iron oxide is the α phase structure; Nano semiconductor oxide average grain size is 5～70nm.
The purposes of the insulating varnish that a kind of manufacture method of pulse resistant surge voltage insulating varnish is made is this insulating varnish is coated on the bare copper wire and to be made enamelled wire, it is characterized in that insulating varnish on this enamelled wire is that described nano-multilayered structures composite particles is scattered in the polyamidoimide insulating resin and makes, both ratios are 1: 10 mass ratio; The bare copper wire diameter is 1.02mm, and the thickness of coating insulating varnish is 0.02mm.
When joining nano semiconductor material in the organic insulating material, can improve the organic insulating material electrical conductance, make because the local accumulation electric charge split-up that surge voltage causes improves the situations that electric charge is concentrated in a large number in the part, reduce the generation of partial discharge.When behind other oxide of the even deposit of these semiconductor material surfaces,, make the surface current of material be unlikely to excessive and cause local overheating destruction insulating material because the synergy between the material is regulated the electric conductivity of semi-conducting material; Protected semi-conducting material, reduced thermal etching and chemical erosion destruction semi-conducting material.In addition, adopt the nanoscale composite particles can improve the insulating material fineness and the transparency, also can eliminate of the influence of non-nano material the insulating material mechanical strength.Coating organic purpose on the inorganic oxide particles surface is to improve the compatibility of powder and organic insulating material, improve the dispersiveness of inorganic particle in organic insulating material, thereby effectively bring into play the function of the pulse resistant surge voltage of nano-multilayered structures composite particles.
This nano-multilayered structures composite particles provided by the invention evenly is dispersed in the insulating varnish, can prepare the insulating material with pulse resistant surge voltage function.Raw material sources are extensive, cost is low, technology is simple, be easy to industry enlarges production.This material can be widely used in the insulating material that requirement has the pulse resistant surge voltage performance, as the insulating varnish of anti-frequency conversion the, the insulation film of anti-frequency conversion the etc., has good process technology performance.
Compared with prior art, the present invention's advantage of giving prominence to is:
1) can bring into play the cooperative effect of nano-scale oxide composite particles, obviously improve the pulse resistant surge voltage ability of insulating material, of many uses, have good process technology performance and useful life.
2) the nano-multilayered structures composite particles can be dispersed in the organic insulating material, gives full play to the special effects of nano particle.
3) the nano-multilayered structures composite particles can be easy to expand to the suitability for industrialized production scale by the preparation of normal temperature and pressure liquid phase reactor.
The method of testing that the pulse resistant surge voltage life-span of enamelled wire adopts among the present invention is:
1) the right preparation of twisted wire: under the 1364g load, with 8 nodes of two enamelled wire strand systems, twisted wire is 0.4m to length.
2) life test: to being placed in the insulating box, temperature is 90 ℃ with twisted wire.Twisted wire connects inverter output terminal to two joints of an end, and the other end is vacant.The output frequency that frequency converter provides is 20KHz, and peak pressure is 3KV, and the peak head rise time is 50ns.According to twisted wire to weighing the pulse resistant surge voltage life-span of enamelled wire breakdown time.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
Take by weighing the anatase titanium dioxide that the 100g average grain size is 10.6nm, add in the 400g deionized water, stir and be made into slurries, adding 98ml concentration in titanium dioxide slurries is 1mol/LAl
2(SO
4)
3Solution is heated to 70 ± 0.2 ℃, and dripping 157ml concentration while stirring is the NaAc solution of 1mol/L, is controlled in the 30min to dropwise, and is warming up to 80 ± 0.2 ℃ behind the insulation 1h, filters, washs to using BaCl behind the insulation 1h
2Check no SO
4 2-, filter cake is dry under 120 ℃, again through 300 ℃ of heat treatment 2h, obtain coating the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide.Take by weighing 100g nano titanium oxide/aluminium oxide composite particles, add in the 400ml deionized water, be warming up to 100 ℃, add the 2g sodium laurate, be cooled to 50 ℃ behind the insulation 2h, filter then, filter cake 100 ℃ of crushed after being dried, is obtained having the Nano composite granules of sandwich construction.Take by weighing this nano-multilayered structures composite particles of 100g, use the method for high speed dispersion that composite particles is distributed in 4000g polyamide-imide resin-methyl pyrrolidone solvent insulating lacquer (polyamide-imide resin content 25wt%), the ratio that finally is prepared into powder and insulating resin is 1: 10 a pulse resistant surge voltage insulating varnish; At diameter is that first coating thickness is 0.06mmPEI (polyester-imide) priming paint on the 1.02mm bare copper wire, coating thickness is that 0.02mm adds PAI (polyamidoimide) the insulation finish paint that 10wt% (ratio of powder and resin) has the Nano composite granules of sandwich construction again, and the pulse resistant surge voltage life-span of the enamelled wire of making is about 52h.Under similarity condition, do not add the nano-multilayered structures composite particles in the PAI of the coating insulation finish paint, the pulse resistant surge voltage life-span of the enamelled wire of making is about 7h.
Embodiment 2
The anatase titanium dioxide that with the average grain size is 30.5nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g sodium laurate again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 40h.
Embodiment 3
The α phase oxidation iron that with the average grain size is 32.5nm is nuclear, adopts the method among the embodiment 1, and preparation coats the nano-sized iron oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g sodium laurate again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 22h.
Embodiment 4
The chromium oxide that with the average grain size is 34.5nm is nuclear, adopts the method among the embodiment 1, and preparation coats the nano chromium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g sodium laurate again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 20h.
Embodiment 5
The anatase titanium dioxide that with the average grain size is 25.5nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g sodium laurate again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 40h.
Embodiment 6
The rutile titanium dioxide that with the average grain size is 20.5nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g sodium laurate again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 32h.
Embodiment 7
Be that the anatase titanium dioxide of 25.5nm and titanium dioxide that average grain size is the 20.5nm rutile-type are nuclear (the anatase titanium dioxide ratio is 50%) with the average grain size, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coat the 2g sodium laurate again, obtain having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 42h.
Embodiment 8
The anatase titanium dioxide that with the average grain size is 32.7nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g sodium laurate again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 43h.
Embodiment 9
The anatase titanium dioxide that with the average grain size is 65.2nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g sodium laurate again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 38h.
Embodiment 10
Take by weighing the anatase titanium dioxide that the 100g average grain size is 10.6nm, add in the 400g deionized water, stir and be made into slurries, adding 167ml concentration in titanium dioxide slurries is 1mol/LNa
2SiO
3Solution is heated to 70 ± 0.2 ℃, drips the H that 100ml concentration is 2mol/L while stirring
2SO
4Solution is controlled in the 30min and dropwises, and is warming up to 80 ± 0.2 ℃ behind the insulation 1h, filters behind the insulation 1h, washing is to using BaCl
2Check no SO
4 2-, filter cake is dry under 120 ℃, again through 300 ℃ of heat treatment 2h, must coat the nano titanium oxide/silica composite particles of 10wt% silica.Take by weighing 100g nano titanium oxide/silica composite particles, add in the 400ml deionized water, be warming up to 100 ℃, add the 2g sodium laurate, be cooled to 50 ℃ behind the insulation 2h, filter then, filter cake 100 ℃ of crushed after being dried, is obtained having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 50h.
Embodiment 11
Take by weighing the anatase titanium dioxide that the 100g average grain size is 10.6nm, add in the 400g deionized water, stir and be made into slurries, adding 65ml concentration in titanium dioxide slurries is 1mol/LBaCl
2Solution is heated to 70 ± 0.2 ℃, drips the Na that 70ml concentration is 1mol/L while stirring
2CO
3Solution is controlled in the 30min and dropwises, and is warming up to 80 ± 0.2 ℃ behind the insulation 1h, filters behind the insulation 1h, washing is to using AgNO
3Check no Cl
-, filter cake is dry under 120 ℃, again through 350 ℃ of heat treatment 2h, must coat the barytic nano titanium oxide of 10wt%/barium monoxide composite particles.Take by weighing 100g nano titanium oxide/barium monoxide composite particles, add in the 400ml deionized water, be warming up to 100 ℃, add the 2g sodium laurate, be cooled to 50 ℃ behind the insulation 2h, filter then, filter cake 100 ℃ of crushed after being dried, is obtained having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 38h.
Embodiment 12
Take by weighing the anatase titanium dioxide that the 100g average grain size is 10.6nm, add in the 400g deionized water, stir and be made into slurries, adding 179ml concentration in titanium dioxide slurries is 1mol/LCaCl
2Solution is heated to 70 ± 0.2 ℃, drips the Na that 180ml concentration is 1mol/L while stirring
2CO
3Solution is controlled in the 30min and dropwises, and is warming up to 80 ± 0.2 ℃ behind the insulation 1h, filters behind the insulation 1h, washing is to using AgNO
3Check no Cl
-, filter cake is dry under 120 ℃, again through 350 ℃ of heat treatment 2h, must coat the nano titanium oxide/calcium oxide composite particles of 10wt% calcium oxide.Take by weighing 100g nano titanium oxide/calcium oxide composite particles, add in the 400ml deionized water, be warming up to 100 ℃, add the 2g sodium laurate, be cooled to 50 ℃ behind the insulation 2h, filter then, filter cake 100 ℃ of crushed after being dried, is obtained having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 42h.
Embodiment 13
Take by weighing the anatase titanium dioxide that the 100g average grain size is 10.6nm, add in the 400g deionized water, stir and be made into slurries, adding 5ml concentration in titanium dioxide slurries is 1mol/LAl
2(SO
4)
3Solution is heated to 70 ± 0.2 ℃, and dripping 8ml concentration while stirring is the NaAc solution of 1mol/L, is controlled in the 30min to dropwise, and is warming up to 80 ± 0.2 ℃ behind the insulation 1h, filters, washs to using BaCl behind the insulation 1h
2Check no SO
4 2-, filter cake is dry under 120 ℃, again through 300 ℃ of heat treatment 2h, must coat the nano titanium oxide/aluminium oxide composite particles of 0.5wt% aluminium oxide.Take by weighing 100g nano titanium oxide/aluminium oxide composite particles, add in the 400ml deionized water, be warming up to 100 ℃, add the 2g sodium laurate, be cooled to 50 ℃ behind the insulation 2h, filter then, filter cake 100 ℃ of crushed after being dried, is obtained having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 22h.
Embodiment 14
Take by weighing the anatase titanium dioxide that the 100g average grain size is 10.6nm, add in the 400g deionized water, stir and be made into slurries, adding 490ml concentration in titanium dioxide slurries is 1mol/LAl
2(SO
4)
3Solution is heated to 70 ± 0.2 ℃, and dripping 787ml concentration while stirring is the NaAc solution of 1mol/L, is controlled in the 30min to dropwise, and is warming up to 80 ± 0.2 ℃ behind the insulation 1h, filters, washs to using BaCl behind the insulation 1h
2Check no SO
4 2-, filter cake is dry under 120 ℃, again through 300 ℃ of heat treatment 2h, must coat the nano titanium oxide/aluminium oxide composite particles of 50wt% aluminium oxide.Take by weighing 100g nano titanium oxide/aluminium oxide composite particles, add in the 400ml deionized water, be warming up to 100 ℃, add the 2g sodium laurate, be cooled to 50 ℃ behind the insulation 2h, filter then, filter cake 100 ℃ of crushed after being dried, is obtained having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 36h.
Embodiment 15
The anatase titanium dioxide that with the average grain size is 10.6nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g lauryl sodium sulfate again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 42h.
Embodiment 16
The anatase titanium dioxide that with the average grain size is 10.6nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g polyvinylpyrrolidone again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 45h.
Embodiment 17
The anatase titanium dioxide that with the average grain size is 10.6nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g odium stearate again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 47h.
Embodiment 18
The anatase titanium dioxide that with the average grain size is 10.6nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g silicone couplet again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 38h.
Embodiment 19
The anatase titanium dioxide that with the average grain size is 10.6nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, coats the 2g titanate coupling agent again, obtains having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 35h.
Embodiment 20
The anatase titanium dioxide that with the average grain size is 10.6nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, takes by weighing 100g nano titanium oxide/aluminium oxide composite particles, adds in the 400ml deionized water, be warming up to 100 ℃, add the 0.5g sodium laurate, be cooled to 50 ℃ behind the insulation 2h, filter then, filter cake 100 ℃ of crushed after being dried, is obtained having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 30h.
Embodiment 21
The anatase titanium dioxide that with the average grain size is 10.6nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, takes by weighing 100g nano titanium oxide/aluminium oxide composite particles, adds in the 400ml deionized water, be warming up to 100 ℃, add the 25g sodium laurate, be cooled to 50 ℃ behind the insulation 2h, filter then, filter cake 100 ℃ of crushed after being dried, is obtained having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 40h.
Embodiment 22
The anatase titanium dioxide that with the average grain size is 10.6nm is a nuclear, adopt the method among the embodiment 1, preparation coats the nano titanium oxide/aluminium oxide composite particles of 10wt% aluminium oxide, take by weighing 100g nano titanium oxide/aluminium oxide composite particles, add in the 400ml deionized water, be warming up to 100 ℃, add the 2g sodium laurate, add the 2g odium stearate behind the insulation 1h, be cooled to 50 ℃ behind the insulation 2h, filter then, filter cake 100 ℃ of crushed after being dried, is obtained having the Nano composite granules of sandwich construction.Be prepared into wire enamel and be coated with into enamelled wire with embodiment 1 same procedure, its pulse resistant surge voltage life-span is about 50h.
Claims (3)
1. the manufacture method of a pulse resistant surge voltage insulating varnish, it is characterized in that it is is additive with a kind of Nano composite granules with sandwich construction, this composite particles is to be core material with the nano semiconductor oxide, evenly be deposited with a kind of oxide on its surface, and coat organic substance again, form a kind of nano-multilayered structures composite particles; The Nano composite granules that again this is had a sandwich construction is dispersed in polyamide-imide resin-methyl pyrrolidone solvent insulating lacquer and makes the insulating varnish with pulse resistant surge voltage performance; Wherein:
The nano semiconductor oxide of described composite particles is titanium dioxide, iron oxide or chromium oxide;
The oxide of described nano semiconductor oxide surface deposit is silica, aluminium oxide, barium monoxide or calcium oxide, and its deposit amount is 0.5～50wt% of nano semiconductor oxide matrix;
The surface coated organic substance of nano semiconductor oxide composite particle of described deposited oxide is lauryl sodium sulfate, polyvinylpyrrolidone, sodium laurate, odium stearate, silicone couplet or titanate coupling agent, and its covering amount is the 0.5-25wt% of described composite particles;
The manufacturing step of this pulse resistant surge voltage insulating varnish is: according to the above ratio, the nano semiconductor oxide is joined in the deionized water, stir and be made into slurries, add Al in these slurries
2(SO
4)
3Solution, BaCl
2Solution, CaCl
2Solution or Na
2SiO
3Solution is heated to 70 ± 0.2 ℃, drips NaAc solution, Na while stirring
2CO
3Solution or H
2SO
4Solution is controlled in the 30min and dropwises, and is warming up to 80 ± 0.2 ℃ behind the insulation 1h, filter behind the insulation 1h, wash to filter cake and no longer include acid ion, this filter cake is dry under 120 ℃, again through 300 ℃ of heat treatment 2h, obtain being deposited with the nano-multilayered structures composite particles of oxide; According to the above ratio with the nano-multilayered structures composite particles, add in the deionized water again, be warming up to 100 ℃, add above-mentioned organic substance coating, be cooled to 50 ℃ behind the insulation 2h, filter then, filter cake 100 ℃ of crushed after being dried, is obtained having the Nano composite granules of sandwich construction; With this nano-multilayered structures composite particles, use the method for high speed dispersion, be distributed in polyamide-imide resin-methyl pyrrolidone solvent insulating lacquer, the ratio that finally is prepared into powder and insulating resin is the pulse resistant surge voltage insulating varnish of 1: 10 mass ratio.
2. the manufacture method of a kind of pulse resistant surge voltage insulating varnish according to claim 1 is characterized in that titanium dioxide crystal form is anatase titanium dioxide, rutile-type or its mixing phase structure in the described nano semiconductor oxide; Iron oxide is the α phase structure; Nano semiconductor oxide average grain size is 5～70nm.
3. the purposes of the insulating varnish that the manufacture method of a kind of pulse resistant surge voltage insulating varnish as claimed in claim 1 or 2 is made is this insulating varnish is coated on the bare copper wire and to be made enamelled wire, it is characterized in that insulating varnish on this enamelled wire is that described nano-multilayered structures composite particles is scattered in the polyamidoimide insulating resin and makes, both ratios are 1: 10 mass ratio; The bare copper wire diameter is 1.02mm, and the thickness of coating insulating varnish is 0.02mm.
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| CN107384188A (en) * | 2017-07-25 | 2017-11-24 | 芜湖乾凯材料科技有限公司 | A kind of nano-composite insulating of resistance to frequency conversion material and preparation method thereof |
| CN110767348A (en) * | 2019-11-12 | 2020-02-07 | 业成科技（成都）有限公司 | Anisotropic conductive film and manufacturing method thereof |
| CN112375255B (en) * | 2020-11-13 | 2022-05-24 | 广东电网有限责任公司电力科学研究院 | Nano-filler and epoxy composite insulating material, preparation method thereof and epoxy composite insulating part |
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2002
- 2002-05-09 CN CN 02111615 patent/CN1231923C/en not_active Expired - Lifetime
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